Means for lubrication of wrist-pins.



J. K. CAMPBELL.

MEANS FOR LUBRIGATION OF WRIST PINS.

APPLICATION FILED AUG.19, 1910v Patented Jan.

3 $HEETS-SHEET L a maid J. K. CAMPBELL. MEANS FOR LUBRIGATION OF WRIST PINS.

APPLICATION FILED AUG. 19, 1.9101

Pa'tenhsd Jan. 3, 3.311.

J. K. CAMPBELL. MEANS FOR LUBRIOATION 0F WRIST PINS.

APPLICATION FILED AUG.19.1910. gg g gy Patented Jan.3,1911.

3 SHEETS-SHEET 3.

i xi 4 t parts being shown in side elevation, ofa

of the pistons and wrist ins shown in Fig. '1, viewed from the si e in longitudinal ton bein I 7 and in the. same position as in said figure.

Fig. 11 is 'a similar view of another modi-- UNITED STATES PATENT OFFICE.

JOHN CAMPBELL, 0F HABHFORD, CONNECTICUT.

MEANS FOR LUBFIICATION'bF WRIST-PINS.

To all whom it may concern: H Be itknown that I, Jorm K. CAMPBELL, a citizen of the United States residing at Hartford, in the county of I-iartford and 5. State of Connecticut, have'invented certain newand useful Improvements in Means for Lubrication ofWrist-Pins, of which the fol: lowing is a specification. I

- .My invention relates to improvements" in 10 means for lubrication of wrist pins and is particularly applicable to engines, pumps and compressors of the-vertical type em-, playing splash lubrication for the cylinder an a piston and the objects of my improve 15"mentsare simplicity and economiyin construction and convenience and e ency in use- I In the accompanying drawings:+-Figure 1 is a longitudinal sectional view, certain pair of cylinders and pistons combined with a common in'closed crank case embodying my improved means of lubrication of .the wrist pins. Fig. 2 is a side elevation of one 'alinement with. the. wrist pins, on an enlarged scale." Fig. 3 is a view of the same turned 90 degrees and one side of the pisshown in section. Fig. 4 is' a bottom view of the same. Fig. 5 is a sectional view'of an end of the wrist pin and the adjacent portions of the piston. Fig. 6

is a similar view of a modi cation of the wrist pin. Fig. 7 is a side elevation of a piston and wrist pin in the position shown v 111 Fig. 2, showing a modi cation of the piston. Fig. 8 is a view of the'same turned 90 degreesl. Fig. 9 is a bottom view of the same. Fig. 10 shows a piston having a modification ofthe oove shown in Fig.

' fication of the same.- Fig. 12 is a view similar 45,to Fig. 1 o f a pair ofpistons-and cylinders and connected parts in which the connecting rod moves on the' wrist pin and involving 1910. Serial in. 577,916.

vide'd on the upper side with a par of openings 20 which communicate with the cylin ders B attached to the said crank shaft casing. (3 is a crank shaft having bearings 21 in the end walls 22 of the said crank A, and having intermediate the said bearings-a pair of cranks 23. Connecting rods D connect the said cranks 23 with the 'istonsE,

which operate within the said cy dersB, the lower end being connected to a crank pin in the usual manner and the upper end-fixedly secured by a set screw F to the wrist pin G at center, which latter-iso" ratively received in bearings .24 male y of the said ,piston E. The said vWrist"pinfar ratentea Jan. a, 1911.

may have a squared end 2541s shown in'Figsi 4 and 5, or the end may conformto the'se'c tion of a sphere 25 as shown in.Fig. 6, and

furthermore the length maybesuch 12o"- provide clearance between-the sameiand the wall 27 "of the cylinder B asshown--in; Fig. 1, all of which conditions'eserveto pgqtide a free space between the end of the wrist pin G- and the wall 270i thep vlinderfl and which space is suitable for receivin oil'iarid from which space the said oil'may delivered to thewrist pin G and the bearingsffiiz therefor for lubricat' crank case-A is genera 1y inclosed below the said cylinders B and the bottom 28' is suitable for retaining a supply of oil into which the said cranks 23 and connecting rods D will dipin the course of their travels. Accordin'gly at each revolution of the crank a quantity of oil will be :sp'lashed about in the crank case A and some will be thrown the sam Theisaid upward within the cylinder B and against the wall 27 of the same... .'1fhe piston E in its travels wipes the oil adherin to the said wall 27 and is thereby lubricate in an ordinary manner. By slabbing off the piston E longitudinally below the hole or bearing 24 provided for the wrist pin G as shown at 29 the oil adhering on the said. wall 27 in aline ,ment with the wrist pin is wiped 0E by{-.th'e

upper wall 30 of" the said holeor and is either delivered directlytp'th said Y 31" shown in 4 "tions of the wall which the wrist pin mation of this slabbed oii portion may however be changed and may be actually slabbed .off from anturned piston or may in the casting from which the cylinder is made. As described the said slabbed oti' portion 29 is located in alinement with the ends of the wrist pin and consequently the-por- G receives its supply of oil are located one on each side of the plane of travel of the connecting rod D and the crank 23. InFigs. 7, 8,9, 10 and 11 the slab 29 is'ata position turned 90' degrees from the axial'line of the wrist pin G and the wristpin oil space or chamber, similar to Fig. 12, is closed at the bottom and generally completelyginclosed by the walls 27 of the cylinder and the walls 32 of the piston E fittin wristapin. The: bottom 3319f the piston Ev upward and terab 29 extends from the mihates at'its, upper end in a groove 34 in the cylinder so that oil willibe delivered by the said groove to the wrist pin G and the said oil chamber 31. In 'Z the said oil groove 3a is horizontal. The groove Mshown in. Fig. 10 has a slight inclination in the direction of the wrist pin G, sufficient-t0 insure the flow of oil toward the -s'ameiand the cove 3 2' shown in Fi 11 'the circumference of has a, ,ater an more pronounced inc ina-" tion tow rd the wrist pin,

' In Figsfl2, 13, 14', and 15 are shown z: piston E ni which thewrist pin G is rigidly vsecured by set screws F adjacent the ends a and to the centers of which wrist pin the chamber 31.

of said wrist pin G.

-ingly serves as a insured for the wrist connecting rod D is operatively connected by a bearing 24% The slab 29 and the groovefie are generally similar to those shqwn fin Fig-10 and deliver oil to the oil of the wrist pin 1 and to the bearing 24" intermediate the said ends I provide an open oil duct 'tends along the entire length of the top side This duct 36 accorddirect means of supplying oil directl from the circumferential groove 34; and oi chamber 31 to the wrist pin bear.-' ing 24. The wrist pin oil chamber 31 may be filled with oil, a continuous supplybeing ployed.

be formed f 27 of the cylinder from the same and-end of the In order to deliver oil from the said oil chambers 31 alon the stationary ends 35 36 which as shown exi' It is apparent that some changes from.

i the specific construction herein disclos'ed may be made and therefore I do not wish to be understood as cise form of construction shown and described, but desire the liberty to make such fairly come within the spirit and scope of the same.

I claim as myinventionz 1.- In combination with a cylinder and a piston operative therein and a crankcase opening into the said cylinder,.a crank shaft operative-in-said crank case and havin a crank, said crank case adapted'to hold a supply of oil of a height suitable for the said crank to dip therein during normal operation so'as to splash said oil against the walls of the said cylinder, a connectingrod the means of connection of thejsaid-piston and connecting rod comprising a transverse ate its "ends a located intermediate the ends of the'isaid piston and received in said opening the said piston generallyfitting the said-walls ofthe said cylinder and being slabbed ed 'at the to said wrist pin hole.

the said cylinder, fitting the same generally and provided with a transverse opening'in der directly to the said wrist pin.

for splashing oil against the walls thereof during normal conditions. of operation,a piston operative in said cylinder, transverse opening through the said piston, a" wrist pin received within the said opening, oil spaces between the said interior walls of the 'cylinfor supplying oil from ,said interior walls directly to the said oil spaces.

means for splashing oil along the interibr walls thereof, a piston operative in the said cylinder and generally fitting the same, a

wrist pin located in the said piston and forming a means of rod, openings extending from-the ends of the said wrist pin outwardly through the side walls of the said piston, the said piston slabbed off for a portion of its length so as to leave clearance between the same and the cylinder wall, and'mean's fordelivering oil from the said clearance space directly to the said openings.

ing meansfor having' oil splashed a inst its interior walls during normal con tions connecting said crank and the said piston,

which is received a wrist pin, meansfor ea"- liverlng oil from the said walls of the'cylin-.

connecting a connecting 5. A cylinder open 'at, one endand hay-- limiting myseli to the fprechanges, in working my invention, as may opening through said-piston and intermedii wrist pin, the said wrist pin' sidefrom one end for a portion of the length,

Q I '95 2. A cylinder open at one end and have, ingmeans for splashing oil along the in-} teriorwalls thereof, a, piston operative in 3. In combination with a cylinder means I der and the ends of the wrist pin, and means 4. A cylinder'open at one end and having 9f use ii. Pi ton. eper t re n he sa d cyliw le fittingthe said cylinder Walls generally, having a portion of the. sides Slilbbed ofi from one end elengthe length in the line ()f pisteii splash oil against the lower Walls of the said cylinder, the said piston slabbed ofi iongi tudinaily from the crank case end to approximately the height of the said Wrist pin so as to" provide a clearance oil space between the said piston and the said cylinder walls, the upper end of said clearance space connected to the said wrist pin, the limiting wall of the said piston at the said upper end a tit for the said cylinder so as to operate to deliver accumulations of oil from the said Walls of the said wrist pin.

- JOHN K. CAMPBELL. Witnesses:

H. O. EDSALL, CHAS. EARL. 

